<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>WebSocket客户端</title>
</head>
<body>

<script type="text/javascript">
    var socket;
    if(window.WebSocket){
        socket = new WebSocket("ws://localhost:8899/ws");
        socket.onmessage = function(event){
        	var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + event.data;
        }

        socket.onopen = function(event){
            var ta = document.getElementById("responseText");
            ta.value = "连接开启";
        }

        socket.onclose = function(event){
        	var ta = document.getElementById("responseText");
        	ta.value = ta.value + "\n" + "连接关闭";
        }
    }else{
    	alert('浏览器不支持webSocket')
    }

    function send(message){
    	if(!window.WebSocket){
    		return;
        }
        if(socket.readyState == WebSocket.OPEN){
        	socket.send(message);
        }else{
        	alert("连接尚未开启")
        }
    }
</script>
<form onsubmit="return false;">
    <textarea name="message" style="width: 400px;height: 200px"></textarea>
    <input type="button" value="发送数据" onclick="send(this.form.message.value)" />
    <h3>服务端输出</h3>
    <textarea id="responseText" style="width: 400px;height: 300px;"></textarea>
    <input type="button" onclick="javascript: document.getElementById('responseText').value=''" value="清空内容" />
</form>

</body>
</html>